package org.apache.commons.jelly.tags.quartz;

/*
 * Copyright 2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.apache.commons.jelly.JellyTagException;
import org.apache.commons.jelly.XMLOutput;
import org.apache.commons.jelly.MissingAttributeException;

import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.JobDetail;
import org.quartz.JobDataMap;

/** Defines a schedulable job.
 *
 *  @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
 */
public class JobTag extends QuartzTagSupport
{
    // ------------------------------------------------------------
    //     Instance members
    // ------------------------------------------------------------

    /** Group of the job. */
    private String group;

    /** Name of the job. */
    private String name;

    // ------------------------------------------------------------
    //     Constructors
    // ------------------------------------------------------------

    /** Construct.
     */
    public JobTag()
    {
        // intentionally left blank.
    }

    // ------------------------------------------------------------
    //     Instance methods
    // ------------------------------------------------------------

    /** Set the name of this job.
     *
     *  @param name The name of this job.
     */
    public void setName(String name)
    {
        this.name = name;
    }

    /** Retrieve the name of this job.
     *
     *  @return The name of this job.
     */
    public String getName()
    {
        return this.name;
    }

    /** Set the group of this job.
     *
     *  @param group The group of this job.
     */
    public void setGroup(String group)
    {
        this.group = group;
    }

    /** Retrieve the group of this job.
     *
     *  @return The group of this job.
     */
    public String getGroup()
    {
        return this.group;
    }

    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    //     org.apache.commons.jelly.Tag
    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    /** Perform this tag.
     *
     *  @param output Output sink.
     *
     *  @throws Exception If an error occurs.
     */
    public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException
    {
        if ( getName() == null )
        {
            throw new MissingAttributeException( "name" );
        }

        if ( getGroup() == null )
        {
            throw new MissingAttributeException( "group" );
        }

        JobDetail detail = new JobDetail( getName(),
                                          getGroup(),
                                          JellyJob.class );

        detail.setDurability( true );

        JobDataMap data = new JobDataMap();

        data.put( "jelly.output",
                  output );

        data.put( "jelly.context",
                  getContext() );

        data.put( "jelly.script",
                  getBody() );

        detail.setJobDataMap( data );

        try {
            Scheduler sched = getScheduler();
            sched.addJob( detail,
                          true );
        }
        catch (SchedulerException e) {
            throw new JellyTagException(e);
        }
    }
}